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"set optimizer_switch to e or d causes invalid memory writes/valgrind warnings": due to prefix support, the argument "e" was overwritten with its full value "engine_condition_pushdown", which caused a buffer overrun. This was wrong usage of find_type(); other wrong usages are fixed here too. Please start reading with the comment of typelib.c.
59 lines
1.8 KiB
Plaintext
59 lines
1.8 KiB
Plaintext
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#
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# 2010-01-20 OBN Added check for I_S values after variable value changed
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#
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SET @start_global_value = @@global.optimizer_switch;
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SELECT @start_global_value;
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#
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# exists as global and session
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#
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select @@global.optimizer_switch;
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select @@session.optimizer_switch;
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show global variables like 'optimizer_switch';
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show session variables like 'optimizer_switch';
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select * from information_schema.global_variables where variable_name='optimizer_switch';
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select * from information_schema.session_variables where variable_name='optimizer_switch';
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#
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# show that it's writable
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#
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set global optimizer_switch=10;
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set session optimizer_switch=5;
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select @@global.optimizer_switch;
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select @@session.optimizer_switch;
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set global optimizer_switch="index_merge_sort_union=on";
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set session optimizer_switch="index_merge=off";
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select @@global.optimizer_switch;
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select @@session.optimizer_switch;
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show global variables like 'optimizer_switch';
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show session variables like 'optimizer_switch';
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select * from information_schema.global_variables where variable_name='optimizer_switch';
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select * from information_schema.session_variables where variable_name='optimizer_switch';
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set session optimizer_switch="default";
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select @@session.optimizer_switch;
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#
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# incorrect assignments
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#
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--error ER_WRONG_TYPE_FOR_VAR
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set global optimizer_switch=1.1;
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--error ER_WRONG_TYPE_FOR_VAR
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set global optimizer_switch=1e1;
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--error ER_WRONG_VALUE_FOR_VAR
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set session optimizer_switch="index_merge";
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--error ER_WRONG_VALUE_FOR_VAR
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set session optimizer_switch="foobar";
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--echo #
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--echo # Bug#59894 set optimizer_switch to e or d causes invalid
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--echo # memory writes/valgrind warnings
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--echo
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set global optimizer_switch = 'd'; # means default
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--error ER_WRONG_VALUE_FOR_VAR
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set global optimizer_switch = 'e';
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SET @@global.optimizer_switch = @start_global_value;
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SELECT @@global.optimizer_switch;
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